Abstract
We present GKG18-DPDFs, a next-to-leading order (NLO) QCD analysis of diffractive parton distribution functions (diffractive PDFs) and their uncertainties. This is the first global set of diffractive PDFs determined within the xFitter framework. This analysis is motivated by all available and most up-to-date data on inclusive diffractive deep inelastic scattering (diffractive DIS). Heavy quark contributions are considered within the framework of the Thorne–Roberts (TR) general mass variable flavor number scheme (GM-VFNS). We form a mutually consistent set of diffractive PDFs due to the inclusion of high-precision data from H1/ZEUS combined inclusive diffractive cross sections measurements. We study the impact of the H1/ZEUS combined data by producing a variety of determinations based on reduced data sets. We find that these data sets have a significant impact on the diffractive PDFs with some substantial reductions in uncertainties. The predictions based on the extracted diffractive PDFs are compared to the analyzed diffractive DIS data and with other determinations of the diffractive PDFs.
Highlights
We present GKG18-DPDFs, a next-to-leading order (NLO) QCD analysis of diffractive parton distribution functions and their uncertainties
We present a new set of diffractive PDFs, referred to as GKG18-DPDFs, through a comprehensive NLO QCD analysis
Key results of the current NLO diffractive PDFs fit compared to all previous analyses are the inclusion of all new and up-to-date experimental diffractive DIS data, in particular, the H1/ZEUS combined data set [45], and the error analysis of the extracted diffractive PDFs
Summary
In the following we describe the standard theoretical framework adopted for the diffractive DIS. There are different theoretical approaches to describe the diffractive processes in literature [46], it is well known that the approach, where the diffractive DIS is mediated by the exchange of the hard Pomeron and a secondary Reggeon. Page 3 of 20 309 can be remarkably successful for the description of most of diffractive DIS data
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